From ddfa9f11766c532209d4ce848c12761d28730338 Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Tue, 2 Apr 2024 19:28:20 -1000 Subject: [PATCH] accel/tcg: Cap the translation block when we encounter mmio MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Do not allow translation to proceed beyond one insn with mmio, as we will not be caching the TranslationBlock. Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: Richard Henderson --- accel/tcg/translator.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/accel/tcg/translator.c b/accel/tcg/translator.c index 0848026935..18138c61e1 100644 --- a/accel/tcg/translator.c +++ b/accel/tcg/translator.c @@ -240,6 +240,8 @@ static bool translator_ld(CPUArchState *env, DisasContextBase *db, /* Use slow path if first page is MMIO. */ if (unlikely(tb_page_addr0(tb) == -1)) { + /* We capped translation with first page MMIO in tb_gen_code. */ + tcg_debug_assert(db->max_insns == 1); return false; } @@ -288,6 +290,8 @@ static bool translator_ld(CPUArchState *env, DisasContextBase *db, if (unlikely(new_page1 == -1)) { tb_unlock_pages(tb); tb_set_page_addr0(tb, -1); + /* Require that this be the final insn. */ + db->max_insns = db->num_insns; return false; }